#include"Data.h"


Date::Date(int year, int month, int day)
{
	_year = year;
	_month = month;
	_day = day;
}

void Date::Print()
{
	cout << _year << ' ' << _month << ' ' << _day << ' ' << endl;
}

bool Date::operator >(const Date& d)
{
	if (_year > d._year)
		return true;
	else if (_year == d._year && _month > d._month)
		return true;
	else if (_year == d._year && _month == d._month)
		return _day > d._day;
	return false;
}

bool Date::operator<(const Date& d)
{
	if (_year < d._year)
		return true;
	else if (_year == d._year && _month < d._month)
		return true;
	else if (_year == d._year && _month == d._month)
		return _day < d._day;
	return false;
}

bool Date::operator==(const Date& d)
{
	return _year == d._year
		&& _month == d._month
		&& _day == d._day;
}

bool Date::operator!=(const Date& d)
{
	return !(*this == d);
}

bool Date::operator<=(const Date& d)
{
	return *this < d || *this == d;
}

bool Date::operator>=(const Date& d)
{
	return *this > d || *this == d;
}

Date& Date::operator+=(int day)
{
	_day += day;
	while (_day > GetMonthDay(_year, _month))
	{
		_day -= GetMonthDay(_year, _month);
		++_month;
		if (_month == 13)
		{
			++_year;
			_month = 1;
		}
	}
	return *this;
}

Date Date::operator+(int day)
{
	Date tmp(*this);
	tmp._day += day;
	while (tmp._day > GetMonthDay(tmp._year, tmp._month))
	{
		tmp._day -= GetMonthDay(tmp._year, tmp._month);
		++tmp._month;
		if (tmp._month == 13)
		{
			++tmp._year;
			tmp._month = 1;
		}
	}
	return tmp;
}

Date& Date::operator-=(int day)   //  
{
	if (day < 0)
	{
		return *this += -day;
	}
	_day -= day;
	while (_day <= 0)
	{
		--_month;
		if (_month == 0)
		{
			--_year;
			_month = 12;
		}
		_day += GetMonthDay(_year, _month);
	}
	return *this;
}

Date Date::operator -(int day)   
{
	Date tmp(*this);
	tmp -= day;
	return tmp;
}